Efficiency drives varied transmissions

Article Abstract:

An overview of developments in the gearbox and transmissions industries is presented.

---

Double cycloid reduces power at speed

Article Abstract:

Gearboxes with on cycloid within another have been developed, achieving major speed reductions. They have low inertias and efficiencies of over 80%. A central shaft drives a conventional gear within a larger ring gear, to which is attached a further conventional gear with peripheral teeth. It has the effect of making the inner ring gear rotate in the same way as in the input shaft, although by a smaller amount. Tests on a brushless motor detected a slight vibration but with no backlash.

---

Combined system varies ratios with efficiency: a continuously variable transmission system devised for tanks may have a future in motor sport

Article Abstract:

A system that combines hydrostatic and mechanical gearbox concepts has been tested on a Chieftain tank, but the developers believe it has potential for use in racing cars. The system uses a conventional gearbox, with gaps between ratios bridged by a hydro-static transmission. There is a conventional output shaft, driven through a clutch, and a variable displacement hydraulic pump. The system features an epicyclic gearbox in between the output shaft and the gearbox. The hydraulic system is used to reduce and increase the input shaft speed.

Similar abstracts:

• Abstracts: Radio pirates grapple with U.S. regulators; low-power poachers see themselves as crusaders for diversity and free speech
• Abstracts: Microfuluidics ramp up chemical production: Micro-etched hydraulic components are being prepared for large scale chemical production and can now be injection moulded
• Abstracts: Winning presentations blend great technology with skill and preparation. Behavioral benchmarks are key to successful interviews
• Abstracts: Auditors and auditing: revisions improve on the ISO 9001 standard. Standards: know and follow ISO 19011's auditing principles

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.